1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_ARM_FTRACE
3 #define _ASM_ARM_FTRACE
5 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
6 #define ARCH_SUPPORTS_FTRACE_OPS 1
9 #ifdef CONFIG_FUNCTION_TRACER
10 #define MCOUNT_ADDR ((unsigned long)(__gnu_mcount_nc))
11 #define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */
14 extern void mcount(void);
15 extern void __gnu_mcount_nc(void);
17 #ifdef CONFIG_DYNAMIC_FTRACE
18 struct dyn_arch_ftrace {
19 #ifdef CONFIG_OLD_MCOUNT
22 #ifdef CONFIG_ARM_MODULE_PLTS
27 static inline unsigned long ftrace_call_adjust(unsigned long addr)
29 /* With Thumb-2, the recorded addresses have the lsb set */
33 extern void ftrace_caller_old(void);
34 extern void ftrace_call_old(void);
43 #if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND)
45 * return_address uses walk_stackframe to do it's work. If both
46 * CONFIG_FRAME_POINTER=y and CONFIG_ARM_UNWIND=y walk_stackframe uses unwind
47 * information. For this to work in the function tracer many functions would
48 * have to be marked with __notrace. So for now just depend on
52 void *return_address(unsigned int);
56 static inline void *return_address(unsigned int level)
63 #define ftrace_return_address(n) return_address(n)
65 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
67 static inline bool arch_syscall_match_sym_name(const char *sym,
70 if (!strcmp(sym, "sys_mmap2"))
71 sym = "sys_mmap_pgoff";
72 else if (!strcmp(sym, "sys_statfs64_wrapper"))
74 else if (!strcmp(sym, "sys_fstatfs64_wrapper"))
75 sym = "sys_fstatfs64";
76 else if (!strcmp(sym, "sys_arm_fadvise64_64"))
77 sym = "sys_fadvise64_64";
79 /* Ignore case since sym may start with "SyS" instead of "sys" */
80 return !strcasecmp(sym, name);
83 #endif /* ifndef __ASSEMBLY__ */
85 #endif /* _ASM_ARM_FTRACE */